Loom



April 25, 1933.

R. ROSSMANN LOOM 2 Sheets-Sheet l I Filed June 4, 193

" Fig. 12

PatentedApr. 25, 19 33 um'ran STATES.

PATENT OFFICE BUDOLI' BDSSMAIiTN, OF MUNICH, GERMANY, ASSIGNOR '10 TEFAGTEXTIL FINAKZ A. G. ZURICH, O1 ZURICH, SWITZERLAND, A CORPORATION 01SWITZERLAND LOOK Application filed June 4, 1930, Serial No. 459,193, andin Germany June 18, 1929.

ing the same to the shuttle, which member will be described hereinafteras the carrier. The object of the said carrier is to grip the end of.the weft thread and to release the same after transmitting the same tothe shuttle,

and in some cases to produce acertain braking action. At the end of theshot the weft thread is cut in the usual way, beaten up etc., whereuponthe end of the thread is immediately gripped again by the carrier.

In the operation of the carrier and the shuttle cooperating therewith itis important, that the weft thread be securely attached to the shuttlebefore the beginning of the shot, and such gripping is diflicult for thereason that the end of the weft thread projects freely from the holdingmember of the carrier, and that therefore the projecting end never has adefinite position, the inner tension of the twisted fibres having thetendency to separate from one another and to bend the end of the threadafter cutting.

The object of the improvements is 'to provide a carrier which isoperatedwithout any loss of yarn, and which can be operated at highvelocity, and with this object in view my invention consists inconstructing the apparatus for transmitting the weft thread from thebobbin to the shuttlein the form of a clamping member mounted on thecarrier and adapted to grip the end of the thread and carry the same tothe shuttle and a second clamping member connected with the shuttle andhaving its clamping jaws disposed angularly to the jaws of the gripper,the said clamping member connected with the shuttle being adapted toenter between the jaws of the clamping member connected with the carrierand to clamp the thread at the same part of its length as soon as it isreleased by the clamping member mounted on the carrier.

For the purpose of explaining the invention an example embodying thesame has been shown in the accompanying drawings in which the samereference characters have been used in all the views to indicatecorresponding parts. In said drawings:

Fig. 1 is a diagrammatical sectional elevation showing the carrier andthe shuttle,

Fig. 2 is an elevation showing the clamping member mounted on thecarrier, the jaws of the clamping member being disengaged line 5-5 ofFig. 4,

carrier and the shuttle, the clamping me'mber mounted on the carrierbeing in clamping engagement with the thread and the clamping member ofthe shuttle being out of clamping position.

Fig. 9 is a similar sectional elevation showing the clamping member ofthe carrier in the position in which it has just released the thread,and the clamping member of the shuttle in the position in which it isabout to clamp the thread,

Fig. 10.is a similar sectional elevation showing the clamping member ofthe shuttle in clamping engagement with the thread,

Fig. 11 is a sectionalelevation showing the clamping member of theshuttle out of clamping engagement with the thread and Fig. 12 is asimilar sectional elevation showing the said clamping member in clampingengagement with the thread.

To the frame a of the loom, which has been diagrammatically shown inFig. 1, a bearing 6 is secured in which a carrier lever 42 is rockinglymounted which is adapted to be rocked in the direction of the arrow 0:by suitable mechanism (not shown). A thread carrier 0 is mounted at thetop of lever o.

tic clamping arms (I which are formed at their outer ends with jaws dhaving wedge shaped opposing faces, the said aws being movable 1n avertical plane. The weft thread e taken from the weft bobbin (not shown)is passed through guide loops p and p the thread brake g, the threadtensioner r and to a bore f of the carrier 0, and its end g is clampedbetween the jaws (1 In front of the said jaws and the end 9 of thethread the shuttle i is guided in a bore h of the frame a of the loom,and the said shuttle is formed with a bore 11 having an outwardlyflaring end portion In, as is shown in Figs. 11 and 12. In the said borea clamping member u is located which comprises two elastic arms mcarrying wedge sha ed jaws m at their outer ends, the sai jaws einglocated in a horizontal plane. Thus the aws d, d and m m are angularlydisplaced with relation to each other. The clamping member a is adaptedto be shifted within the bore 11 of the shuttle so as to move the jawsm, m into clamping engagement with the thread e and to spread the jaws d(1 apart, as has been shown in Fig. 10.

While the end of the thread end is clamped between the jaws d al as isshown in Figs. 4, 5 and 8, the jaws m m of the clamping member at areopen, as is shown in Figs. 7 8 and 11. When rocking the carrier lever 0to the right and towards the shuttle i the jaws d, d pass between theopen jaws m m and so far that they slightly extend with their right handends beyond the jaws m m while at the left hand end of the jaws m, 'mextend slightly beyond the jaws (1 ,03 For the present the jaws (P, (lare still in clamping engagement with the end 9 of the thread, as isshown in Fig. 8. Now the clamping member u is by suitable means slightlyshifted to the right and into the flaring portion is of the bore of theshuttle 2', until both pairs of jaws are disposed with their inner andouter end faces respectively in the same planes. By thus slightlyshifting the clamping member u to the right the flaring portion isforces the jaws m m towards each other and towards the thread 9. Therebythe jaws d, d are forced apart. Now the end 9 of the thread istemporarily out of clamping engagement with each pair of jaws m, m and dal But immediately after bein released from the jaws al al it is again 0amped between the jaws m m as is shown in Fig. 10. The jaws m m arelocated exactly between the jaws 03 d and therefore the end 9 of thethread is gripped by the jaws m m at the same part of its length andtherefore without any loss of thread, and when transmitting the threadfrom the jaws d d to the jaws m m it is clamped by the jaws m 'm. atright angles as compared to the clamping position of the jaws d d. Thejaws m, m and (P, d are simultaneously brought respectively into and outof clamping engagement and without providing special operating means.

After the weft thread has been carried through the warp shed b theshuttle, it is cut a jacent the carrier 0 amps d in a manner well knownin the art. The clamps d have been closed in the meantime and thecarrier is swun back into the position shown in Fig. 1. A ter beatingthe weft thread into place the jaws m, m are again opened by shiftingthe clamping member m outwardly and the shuttle is returned to itsinitial position whereupon the operation is repeated.

While in describing the invention reference has been made to aconstruction in which wedge shaped clamping jaws are provided, I wish itto be understood that I do not limit myself to this construction, andthat clamping jaws of other form may be provided if separate means areprovided for throwing the jaws apart.

I claim:

1. In a loom, the combination with a shuttle, of a carrier fortransmitting the end of a thread to the shuttle, a clamping device onsaid carrier, a clamping device on said shuttle, means for bringing saidclamping devices into positions for clamping engagement with the samepart of the thread by either of said devices, and means forsimultaneously forcing one of said clamping devices ,into and the otherout of clamping engagement with the thread.

2. In a loom, the combination with a shuttle, of a carrier fortransmitting the end of the thread to the shuttle, a clamping device onsaid carrier, a clamping device on said shuttle, means for bringing saidclamping device on the carrier and said clamping device on said shuttleinto positions for clamping engagement with the same part of the threadby either of said devices, and means for forcing said clamping device onsaid shuttle into clamping engagement with said thread, the saidclamping devices on the shuttle and the carrier being constructed insuch a manner that the clamping device on the carrier is opened by theclamping device on the shuttle moving into clamping engagement with thethread.

3. In a loom, the combination with a shuttle, of a carrier fortransmitting the end of a thread to the shuttle, a clamping device onsaid carrier, a clamping device on said shuttle, means for bringing saidclamping device on the carrier and said clamping device on the shuttleinto positions for clamping engagement with the same part of the threadby either of said devices, and means for forcing said clamping device onsaid shuttle into clamping engagement with said thread, said clampingdevice on the carrier being formed with wedge shaped clamping jawsadapted to be spread apart by the clamping device of said shut-tleengaging the wedge shaped faces thereof.

4. In a loom, the combination with a shuttle. of a carrier fortransmitting the end of a thread to the shuttle, a clamping device onsaid carrier, a clamping device on said shuttle, means for bringing saidclamping devices on the carrier and the shuttle into positions forclamping engagement with the same part of the thread by either of saiddevices, and means for forcing said clamping device on said shuttle intoclamping engagement with said thread, said clamping devices on thecarrier and on the shuttle being formed with wedge shaped clamping jawsdisplaced angularly with relation to each other and adapted forengagement with each other.

5. In a loom, the combination with a shuttle, of a carrier fortransmitting the end of a thread to the shuttle, a thread clampingdevice on said carrier. a tubular member on said shuttle, a clampingdevice having outwardly flaring clamping arms in said tubular member,said arms being movable toward each other upon axially shifting saidarms in said tubular member, said clamping devices in the carrier andshuttle adapted to be positioned for transmitting a thread held by thecarrier to said shuttle, means for operating said carrier, and means formoving said device within said tubular member.

6. The combination with a shuttle, a thread carrier arm movable towardsand away from the shuttle, spaced spring arms carried by the carrier,wedge shaped gripping blocks carried by said spring arms and adapted togrip opposite sides of a thread end and move said thread end towards theshuttle, a member slidably mounted in theshuttle, oppositely disposedspring arms carried b said member, wedge shaped gripping mem ers carriedby said last named spring arms and in a plane at a right angle to thegripping members carried by the carrier arms and means carried by theshuttle and cooperating with the sprin arms movable therein whereby saidmem ers carried by said last named gripping arms will be forced togetherand cooperating with the gripping members of the carrier for forcingthem out ofengagement with the thread end.

7. The combination with a thread transfer carrier, a shuttle, of springactuated gripping jaws carried by the carrier and wedge shaped, springactuated wedge shaped gripping jaws carried by the shuttle and adaptedto inter'engage with the ri ping jaws of the carrier, a member sli ab ymounted in the shuttle, spring arms carried by said member and on whichthe gripping jaws of the shuttle are mounted and cam engaging surfacescarried by the member in the shuttle and the slmttle whereby uponlongitudinal movement of the member in the shuttle,

the gripping jaws thereof will be forced into a gripping engagement witha thread simultaneously with the release of the thread in the carrierjaws by the cooperation of the shuttle jaws therewith.

8. In a loom, a stationary weft bobbin for carrying the supply of weftthread, a shuttle, a pivoted reciprocating carrier for transporting thethread from the said bobbin to the shuttle, said carrier having aplurality of cooperating, spring-actuated clamping jaws for gripping theweft thread, a plurality of co-operating spring actuated clamping jawson said shut-tle, means for inserting the closed jaws of the carrierbetween the open jaws of the shuttle and means for simultaneouslyclosing the jaws of the shuttle and opening the jaws of the carrier.

9. In a shuttle threading device, a shuttle, a thread carrier, means formoving said thread carrier towards said shuttle, resilient arms on saidcarrier, gripping members on said resilient arms, a member havingoppositely disposed resilient arms slidably mounted in said shuttle,gripping members on said last-named resilient arms movable in a plane atan angle to the movement of the firstnamed gripping members, saidresilient arms actuated by sliding in said shuttle, said shuttlegripping members adapted to grip the same. portion of thread held bysaid carrier gripping members and releasing the thread from said carriergripping members.

In testimony whereof, I hereunto affix my signature.

RUDOLF ROSSMANN.

